Perrin 08-20 Subaru STI Top Mount Intercooler (TMIC) - SilverPSP ITR 302SL Add a consistent 10+ wheel horsepower with the largest Top Mounted Intercooler on the market! Perrin Performance pushed every dimension to make this the best TMIC for your STI! The Perrin Performance Intercooler Core is 75% larger than the stock intercooler, featuring a higher flow design and more consistent horsepower gain when compared to other cores. The larger core means less restriction and better cooling capabilities for more